3121664530 has 16 divisors (see below), whose sum is σ = 5619746304. Its totient is φ = 1248499120.

The previous prime is 3121664521. The next prime is 3121664531. The reversal of 3121664530 is 354661213.

It is a junction number, because it is equal to n+sod(n) for n = 3121664492 and 3121664501.

It is not an unprimeable number, because it can be changed into a prime (3121664531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81969 + ... + 113851.

It is an arithmetic number, because the mean of its divisors is an integer number (351234144).

Almost surely, 2^3121664530 is an apocalyptic number.

3121664530 is a deficient number, since it is larger than the sum of its proper divisors (2498081774).

3121664530 is a wasteful number, since it uses less digits than its factorization.

3121664530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41681.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 3121664530 is about 55871.8581219562. The cubic root of 3121664530 is about 1461.4885253490.

The spelling of 3121664530 in words is "three billion, one hundred twenty-one million, six hundred sixty-four thousand, five hundred thirty".